一、一般配置
发送邮件需要用到 mail包 maven 依赖如下：
1 <!-- https://mvnrepository.com/artifact/javax.mail/mail --> 2 <dependency> 3 <groupId>javax.mail</groupId> 4 <artifactId>mail</artifactId> 5 <version>1.4</version> 6 </dependency>
SSL加密方式需要用到MailSSLSocketFactory类
<!-- https://mvnrepository.com/artifact/com.sun.mail/javax.mail --><dependency><groupId>com.sun.mail</groupId><artifactId>javax.mail</artifactId><version>1.4.4</version></dependency>
获取配置文件：
1 //获取邮箱发送邮件的配置信息2 public Properties getEmailProperties(){3 Properties props = new Properties();4 String host = evn.getProperty("email.host");5 String protocol = evn.getProperty("email.protocol");6 String port = evn.getProperty("email.port");7 String from = evn.getProperty("email.from");8 String pwd = evn.getProperty("email.password");9 props.put("mail.smtp.host", host);//设置服务器地址
10 props.put("mail.store.protocol" , protocol);//设置协议
11 props.put("mail.smtp.port", port);//设置端口
12 props.put("from" , from);
13 props.put("pwd" , pwd);
14 props.put("mail.smtp.auth" , "true");
15 return props;
16 }
邮件发送代码类：
1 /** 2 *3 * @file springBootExample.example.infrastructure4 * 5 */6 package com.tyky.educloud.platform.util;7 8 /** 9 * @ClassName: SendEmail 10 * @Description: TODO(这里用一句话描述这个类的作用) 11 * @author hoojjack 12 * @date 2017年7月19日 下午3:23:42 13 * 14 */15 import java.util.Date;16 import java.util.Properties;17 18 import javax.mail.Authenticator;19 import javax.mail.Message;20 import javax.mail.MessagingException;21 import javax.mail.PasswordAuthentication;22 import javax.mail.Session;23 import javax.mail.Transport;24 import javax.mail.internet.AddressException;25 import javax.mail.internet.InternetAddress;26 import javax.mail.internet.MimeMessage;27 28 public class SendEmail {29 30 public static Properties props = new Properties();31 32 public static void setProps(Properties props) {33 SendEmail.props = props;34 }35 36 public static Properties getProps() {37 return props;38 }39 40 /**41 * 获取Session42 * 43 * @return44 */45 private static Session getSession(final String from, final String pwd) {46 47 Authenticator authenticator = new Authenticator() {48 49 @Override50 protected PasswordAuthentication getPasswordAuthentication() {51 return new PasswordAuthentication(from, pwd);52 }53 54 };55 Session session = Session.getDefaultInstance(props, authenticator);56 57 return session;58 }59 60 public static void send(String content, String toEmail) throws AddressException, MessagingException {61 Properties properties = getProps();62 String from = properties.getProperty("from");63 String pwd = properties.getProperty("pwd");64 String subject = properties.getProperty("subject");65 66 if (null == from || null == pwd) {67 System.out.println("发送邮箱为空");68 return;69 }70 if (null == subject) {71 subject = "平台";72 }73 Session session = getSession(from, pwd);74 // Instantiate a message75 Message msg = new MimeMessage(session);76 // Set message attributes77 msg.setFrom(new InternetAddress(from));78 InternetAddress[] address = { new InternetAddress(toEmail) };79 msg.setRecipients(Message.RecipientType.TO, address);80 msg.setSubject(subject);81 msg.setSentDate(new Date());82 msg.setContent(content, "text/html;charset=utf-8");83 // Send the message84 Transport.send(msg);85 }86 87 public static String generateContent(String contentTitle, String url, String username, String email,88 String validateCode) {89 90 // String validataCode = MD5Util.encode2hex(email);91 92 /// 邮件的内容93 StringBuffer sb = new StringBuffer(contentTitle);94 sb.append("<a href=\"" + url + "?username=");95 sb.append(username);96 sb.append("&email=");97 sb.append(email);98 sb.append("&validateCode=");99 sb.append(validateCode);
100 sb.append("\">" + url + "?username=");
101 sb.append(username);
102 sb.append("&email=");
103 sb.append(email);
104 sb.append("&validateCode=");
105 sb.append(validateCode);
106 sb.append("</a>");
107 return sb.toString();
108 }
109
110 }
邮件发送完整的代码：
1 /** 2 * @ClassName: SendEmail 3 * @Description: TODO(这里用一句话描述这个类的作用) 4 * @author hoojjack 5 * @date 2017年7月19日 下午3:23:42 6 * 7 */8 import java.util.Date;9 import java.util.Properties;10 11 import javax.mail.Authenticator;12 import javax.mail.Message;13 import javax.mail.MessagingException;14 import javax.mail.PasswordAuthentication;15 import javax.mail.Session;16 import javax.mail.Transport;17 import javax.mail.internet.AddressException;18 import javax.mail.internet.InternetAddress;19 import javax.mail.internet.MimeMessage;20 21 public class SendEmail {22 23 public static Properties props = new Properties();24 25 public static void setProps(Properties props) {26 SendEmail.props = props;27 }28 29 public static Properties getProps() {30 props.put("mail.smtp.host", "smtp.163.com");// 设置服务器地址31 props.put("mail.store.protocol", "smtp.163.com");// 设置协议32 props.put("mail.smtp.port", 25);// 设置端口33 props.put("from", "XXX");34 props.put("pwd", "XXX");35 props.put("mail.smtp.auth", "true");36 }37 38 /**39 * 获取Session40 * 41 * @return42 */43 private static Session getSession(final String from, final String pwd) {44 45 Authenticator authenticator = new Authenticator() {46 47 @Override48 protected PasswordAuthentication getPasswordAuthentication() {49 return new PasswordAuthentication(from, pwd);50 }51 52 };53 Session session = Session.getDefaultInstance(props, authenticator);54 55 return session;56 }57 58 public static void send(String content, String toEmail) throws AddressException, MessagingException {59 Properties properties = getProps();60 String from = properties.getProperty("from");61 String pwd = properties.getProperty("pwd");62 String subject = properties.getProperty("subject");63 64 if (null == from || null == pwd) {65 System.out.println("发送邮箱为空");66 return;67 }68 if (null == subject) {69 subject = "平台";70 }71 Session session = getSession(from, pwd);72 // Instantiate a message73 Message msg = new MimeMessage(session);74 // Set message attributes75 msg.setFrom(new InternetAddress(from));76 InternetAddress[] address = { new InternetAddress(toEmail) };77 msg.setRecipients(Message.RecipientType.TO, address);78 msg.setSubject(subject);79 msg.setSentDate(new Date());80 msg.setContent(content, "text/html;charset=utf-8");81 // Send the message82 Transport.send(msg);83 }84 85 public static String generateContent(String contentTitle, String url, String username, String email,86 String validateCode) {87 88 // String validataCode = MD5Util.encode2hex(email);89 90 /// 邮件的内容91 StringBuffer sb = new StringBuffer(contentTitle);92 sb.append("<a href=\"" + url + "?username=");93 sb.append(username);94 sb.append("&email=");95 sb.append(email);96 sb.append("&validateCode=");97 sb.append(validateCode);98 sb.append("\">" + url + "?username=");99 sb.append(username);
100 sb.append("&email=");
101 sb.append(email);
102 sb.append("&validateCode=");
103 sb.append(validateCode);
104 sb.append("</a>");
105 return sb.toString();
106 }
107
108 }
以下是两种不同加密方式的代码，与上面默认25端口的方式差别较小，注意不同加密方式红色部分。
1. JavaMail – via TLS
1 package com.mkyong.common;2 3 import java.util.Properties;4 5 import javax.mail.Message;6 import javax.mail.MessagingException;7 import javax.mail.PasswordAuthentication;8 import javax.mail.Session;9 import javax.mail.Transport;
10 import javax.mail.internet.InternetAddress;
11 import javax.mail.internet.MimeMessage;
12
13 public class SendMailTLS {
14
15 public static void main(String[] args) {
16
17 final String username = "username@gmail.com";
18 final String password = "password";
19
20 Properties props = new Properties();
21 props.put("mail.smtp.auth", "true");
22 props.put("mail.smtp.starttls.enable", "true");
23 props.put("mail.smtp.host", "smtp.gmail.com");
24 props.put("mail.smtp.port", "587");
25
26 Session session = Session.getInstance(props,
27 new javax.mail.Authenticator() {
28 protected PasswordAuthentication getPasswordAuthentication() {
29 return new PasswordAuthentication(username, password);
30 }
31 });
32
33 try {
34 Message message = new MimeMessage(session);
35 message.setFrom(new InternetAddress("from-email@gmail.com"));
36 message.setRecipients(Message.RecipientType.TO,
37 InternetAddress.parse("to-email@gmail.com"));
38 message.setSubject("Testing Subject");
39 message.setText("Dear Mail Crawler,"
40 + "\n\n No spam to my email, please!");
41
42 Transport.send(message);
43 System.out.println("Done");
44
45 } catch (MessagingException e) {
46 throw new RuntimeException(e);
47 }
48 }
49 }
2. JavaMail – via SSL
package com.mkyong.common;import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;public class SendMailSSL {public static void main(String[] args) {Properties props = new Properties();props.put("mail.smtp.host", "smtp.gmail.com");props.put("mail.smtp.socketFactory.port", "465");props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");props.put("mail.smtp.auth", "true");props.put("mail.smtp.port", "465");Session session = Session.getDefaultInstance(props,new javax.mail.Authenticator() {protected PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication("username","password");}});try {Message message = new MimeMessage(session);message.setFrom(new InternetAddress("from@no-spam.com"));message.setRecipients(Message.RecipientType.TO,InternetAddress.parse("to@no-spam.com"));message.setSubject("Testing Subject");message.setText("Dear Mail Crawler," +"\n\n No spam to my email, please!");Transport.send(message);System.out.println("Done");} catch (MessagingException e) {throw new RuntimeException(e);}}
} 注意：如果以上ssl不行可以尝试将ssl红色部分用以下代码替换：
1 MailSSLSocketFactory sf = null;
2 try {
3 sf = new MailSSLSocketFactory();
4 sf.setTrustAllHosts(true);
5 } catch (GeneralSecurityException e1) {
6 e1.printStackTrace();
7 }
8 props.put("mail.smtp.ssl.enable", "true");
9 props.put("mail.smtp.ssl.socketFactory", sf);
